Misa bought a bouquet of flowers for her mother's birthday. the flowers cost $30.00. in addition, she had to pay 7% tax. how much did misa spend, including the tax? ( show )

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?